IFEL ARM3/FPA processor for Acorn BBC A3000

The IFEL ARM3/FPA processor upgrade replaced the surface mounted ARM2 CPU which ran at 8MHz with a daughterboard mounted in a socket sporting an ARM3 CPU running at 25MHz. This helped the A3000 jump from @4.8 MIPS to @12.72 MIPS delivering a significant increase in performance.

At the top of the ARM3 daughter board upgrade, you can see the pins ready to accept an FPA10 daughterboard for the floating point co-processor. The FPA10 daughterboard was never manufactured and the ARM3/FPA board was re-designed to accommodate the FPA10 chip in a socket.